Explosion-proof metallized film for photovoltaic inverter capacitor
By designing a special structure for the explosion-proof metallized film, the problem of easy explosion of photovoltaic inverter capacitors was solved, achieving a balance between safety, explosion protection, and lifespan, improving work efficiency and reducing costs.
Patent Information
- Application Number
- CN202520012121.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Existing photovoltaic inverter capacitors are prone to catching fire and exploding during use, and there is a lack of effective explosion-proof technology support.
Design an explosion-proof metallized film, using a metallized electrode plate with a special structure. The straight warp lines that are separated from the mesh coating and the mesh edge adopt a fuse structure. The self-healing performance can break the circuit and prevent explosion when the voltage is too high, and no additional explosion-proof structure is required.
It achieves the safety and explosion-proof function of capacitors, improves work efficiency, reduces production costs, and balances with lifespan, ensuring that the capacitor's lifespan meets customer requirements.
Smart Images
Figure CN223770969U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of capacitor technology, and in particular to an explosion-proof metallization film for use on photovoltaic inverter capacitors. Background Technology
[0002] Photovoltaic inverters need to meet various functional requirements, not only ensuring DC / AC conversion but also guaranteeing the quality of output power. As end customers and designers increase their demands for the efficiency and reliability of these devices, photovoltaic inverters are developing towards simpler topologies, fewer components, and higher modularity. Thin-film capacitors are widely used in photovoltaic inverters due to their excellent and stable performance and long-term reliable lifespan. However, currently available photovoltaic inverter capacitors lack particularly effective technical support for explosion prevention, making them prone to catching fire and potentially exploding during use. Utility Model Content
[0003] The purpose of this invention is to provide an explosion-proof metallized film for photovoltaic inverter capacitors. This explosion-proof metallized film is not easy to catch fire, effectively preventing capacitor explosions. Moreover, the thin-film capacitor, with its excellent and stable performance and long-term reliable lifespan, effectively balances the explosion-proof performance and lifespan of the capacitor, thereby meeting customer requirements and overcoming the shortcomings of the prior art.
[0004] The technical solution of this utility model is as follows: an explosion-proof metallized film for photovoltaic inverter capacitors, comprising a plastic film, a metal plating layer on the surface of the plastic film, the metallized film comprising a grid section sheet resistor A, a grid section sheet resistor B, a grid edge section C, a grid edge section D, and a screen strip, wherein the widths of the grid section sheet resistor A and the grid section sheet resistor B are both greater than 1 / 3 and less than 1 / 2 of the film width, the screen strip is a blank transparent unplated area, and the grid section sheet resistor A, the grid section sheet resistor B, the grid edge section C, and the grid edge section D are all covered with a metal plating layer, characterized in that: the grid section A square resistor A and a mesh edge C are separated by several unplated grid strips E, which are disposed between the square resistor A and the mesh edge C. Mesh edge safety devices are provided on both sides of each unplated grid strip E, and the square resistor A and the mesh edge C are connected by these safety devices. Similarly, a square resistor B and a mesh edge D are separated by several unplated grid strips E, which are disposed between the square resistor B and the mesh edge D. Mesh edge safety devices are provided on both sides of each unplated grid strip E, and the square resistor B and the mesh edge D are connected by these safety devices.
[0005] Furthermore, the grid section sheet resistor A includes several parallel grids, which are separated by blank grid edges F. Each grid has two grid edge safety features. One end of the blank grid edge F is connected to an unplated grid strip E, and the other end is connected to the screen strip. The grid section sheet resistor B includes several parallel grids, which are separated by blank grid edges F. Each grid has two grid edge safety features. One end of the blank grid edge F is connected to an unplated grid strip E, and the other end is connected to the screen strip. The grid section sheet resistor A and the grid section sheet resistor B have the same structure but opposite directions.
[0006] Furthermore, the angle between the blank mesh edge F in the grid section A and the screen strip is between 80 and 90 degrees, and the blank mesh edge F is composed of an unplated area within the plastic film. Similarly, the angle between the blank mesh edge F in the grid section B and the mesh edge section D is between 80 and 90 degrees, and the blank mesh edge F is composed of an unplated area within the plastic film.
[0007] Furthermore, the width of the mesh edge C is L2 = 2.0 ± 0.5 mm, the width of the mesh edge D is L3 = 2.0 ± 0.5 mm, the width of the screen is L4 = 2.0 ± 0.5 mm, and the mesh height is L9 = 15.0 ± 0.5 mm.
[0008] Furthermore, the angle between the blank mesh edge F within the grid section A and the screen strip is 89 degrees; the angle between the blank mesh edge F within the grid section B and the mesh edge section D is 89 degrees.
[0009] The above technical solution has the following beneficial effects:
[0010] The explosion-proof metallized film provided by this utility model, while possessing the "self-healing" performance of ordinary metallized films, utilizes a special structural design of the metallized electrode plate. The transverse warp lines in the middle of the rectangular grid coating are mutually insulated, and the straight warp lines separated by C and D at the grid edge all employ a fuse structure. When the voltage is too high, the instantaneous high temperature generated by the fuse breakdown will cause the warp lines to break the circuit, thereby cutting off the current and achieving the explosion-proof function. No additional explosion-proof structure is required, improving work efficiency, reducing production costs, and achieving the effect of capacitor safety protection. Moreover, the explosion-proof and lifespan are effectively balanced. According to customer feedback, the lifespan of the capacitor formed by this film meets customer requirements.
[0011] The safety film capacitor of this invention is mainly used in the field of photovoltaic inverters. Under the same design, the ultimate withstand voltage of the safety film is higher than that of ordinary film. The safety film design can reduce the sheet resistance on the film, thereby improving the current carrying capacity of the capacitor. Attached Figure Description
[0012] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0013] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0014] Figure 1 This is a schematic diagram of the structure of the explosion-proof metallized film of this utility model. Detailed Implementation
[0015] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0016] See Figure 1As shown, this utility model discloses an explosion-proof metallized film for a photovoltaic inverter capacitor, comprising a plastic film, a metal plating layer on the surface of the plastic film, and the metallized film comprising a grid sheet resistor A (1), a grid sheet resistor B (5), a grid edge portion C (2), a grid edge portion D (4), and a screen strip (3). The widths of the grid sheet resistors A (1) and B (5) are both greater than 1 / 3 and less than 1 / 2 of the film width. The screen strip (3) is a blank, transparent, unplated area. The grid sheet resistors A (1), B (5), C (2), and D (4) all have metal plating layers. The grid sheet resistors A (1) and B (5) have the same structure but opposite directions. The grid sheet resistors A (1) and B (5) are located on opposite sides of the screen strip (3). The grid sheet resistors A (1) and B (5) are located on opposite sides of the screen strip (3). The grid section A (1) and the grid section C (2) are connected by the grid section safety devices through several unplated grid strips E, which are separated by blank grid edges F. Each grid has two grid edge safety devices. One end of each blank grid edge F is connected to the unplated grid strip E, and the other end is connected to the screen strip (3). The grid section B (5) and the grid section D (4) are separated by several unplated grid strips E, which are separated by blank grid edges F. Each grid has two grid edge safety devices. One end of each blank grid edge F is connected to the unplated grid strip E, and the other end is connected to the screen strip (3).
[0017] The angle between the blank mesh edge F within the grid section sheet resistor A(1) and the screen strip (3) is between 80 and 90 degrees, preferably 89 degrees. The blank mesh edge F is formed by an unplated area within the plastic film. The mesh edge D(2) and the screen strip (3) are located on opposite sides of the grid section sheet resistor A(1). The angle between the blank mesh edge F within the grid section sheet resistor B(5) and the mesh edge D(4) is between 80 and 90 degrees, preferably 89 degrees. The blank mesh edge F is formed by an unplated area within the plastic film. The mesh edge D(4) and the screen strip (3) are located on opposite sides of the grid section sheet resistor B(5).
[0018] Taking the explosion-proof metallized film with a membrane width of L1 = 36.5 ± 0.5 mm as an example, the width of its mesh edge C (2) is L2 = 2.0 ± 0.5 mm, the width of its mesh edge D (4) is L3 = 2.0 ± 0.5 mm, the width of its screen strip (3) is L4 = 2.0 ± 0.5 mm, the safety width of its mesh edge is L5 = 2.0 ± 0.5 mm, the width of its unplated grid strip E is L6 = 0.3 ± 0.1 mm, the width of its blank mesh edge F is L7 = 0.3 ± 0.1 mm, the width of its grid is L8 = 17.0 ± 0.5 mm, and the height of its grid is L9 = 15.0 ± 0.5 mm.
[0019] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.
Claims
1. A kind of anti-explosion metallized film on photovoltaic inverter capacitor, comprising plastic film, metal plating on the surface of plastic film, and the metallized film includes grid part square resistance A (1), grid part square resistance B (5), net edge part C (2), net edge part D (4) and screen belt (3), the width of grid part square resistance A (1) and grid part square resistance B (5) is greater than 1 / 3 of film width and less than 1 / 2 of film width, screen belt (3) is blank transparent no plating area, and there is metal plating on grid part square resistance A (1), grid part square resistance B (5), net edge part C (2) and net edge part D (4), characterized in that: The grid part resistance A (1) and the net edge part C (2) are separated by several sections of non-plated grid bars E, the non-plated grid bars E are arranged between the grid part resistance A (1) and the net edge part C (2), the non-plated grid bars E are provided with net edge part safety on both sides, and the grid part resistance A (1) and the net edge part C (2) are connected through the net edge part safety; the grid part resistance B (5) and the net edge part D (4) are separated by several sections of non-plated grid bars E, the non-plated grid bars E are arranged between the grid part resistance B (5) and the net edge part D (4), the non-plated grid bars E are provided with net edge part safety on both sides, and the grid part resistance B (5) and the net edge part D (4) are connected through the net edge part safety.
2. An explosion-proof metallized film for photovoltaic inverter capacitor according to claim 1, characterized in that: The grid part resistance A (1) includes several parallel grids, the grids are separated by blank net edges F, two net edge part safeties are arranged on each of the grids, one end of the blank net edge F is connected with the non-plated grid bar E, and the other end is connected with the screen belt (3); the grid part resistance B (5) includes several parallel grids, the grids are separated by blank net edges F, two net edge part safeties are arranged on each of the grids, one end of the blank net edge F is connected with the non-plated grid bar E, and the other end is connected with the screen belt (3), and the grid part resistance A (1) and the grid part resistance B (5) have the same structure and opposite directions.
3. An explosion-proof metallized film for photovoltaic inverter capacitors according to claim 2, characterized in that: The included angle between the blank net edge F in the grid part resistance A (1) and the screen belt (3) is between 80 degrees and 90 degrees, and the blank net edge F is composed of a non-plated area in a plastic film; the included angle between the blank net edge F in the grid part resistance B (5) and the net edge part D (4) is between 80 degrees and 90 degrees, and the blank net edge F is composed of a non-plated area in a plastic film.
4. An explosion-proof metallized film for photovoltaic inverter capacitor according to claim 1, characterized in that: The width L2 of the net edge part C (2) is 2.0±0.5MM, the width L3 of the net edge part D (4) is 2.0±0.5MM, the width L4 of the screen belt (3) is 2.0±0.5MM, and the grid height L9 is 15.0±0.5MM.
5. An explosion-proof metallized film for photovoltaic inverter capacitor according to claim 3, characterized in that: The included angle between the blank net edge F in the grid part resistance A (1) and the screen belt (3) is 89 degrees; the included angle between the blank net edge F in the grid part resistance B (5) and the net edge part D (4) is 89 degrees.